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Thermal and electrical conductivity of Fermi pocket models of underdoped
cuprates: Several models of the electronic spectrum in the pseudogap state of
underdoped cuprates have been proposed to explain ARPES and STM measurements,
which reveal only truncated Fermi pockets instead of a full metallic Fermi
surface. We co... | cond-mat_supr-con |
Non-Abelian Anyons and Non-Abelian Vortices in Topological
Superconductors: Anyons are particles obeying statistics of neither bosons nor fermions.
Non-Abelian anyons, whose exchanges are described by a non-Abelian group acting
on a set of wave functions, are attracting a great attention because of
possible applicati... | cond-mat_supr-con |
Double path interference and magnetic oscillations in Cooper pair
transport through a single nanowire: We show that the critical current of the Josephson junction consisting of
superconducting electrodes coupled through a nanowire with two conductive
channels can reveal the multi-periodic magnetic oscillations. The
m... | cond-mat_supr-con |
Ballistic magnon transport and phonon scattering in the antiferromagnet
Nd$_2$CuO$_4$: The thermal conductivity of the antiferromagnet Nd$_2$CuO$_4$ was measured
down to 50 mK. Using the spin-flop transition to switch on and off the acoustic
Nd magnons, we can reliably separate the magnon and phonon contributions to
... | cond-mat_supr-con |
First Order Premelting Transition of Vortex Lattices: Vortex lattices in the high temperature superconductors undergo a first order
phase transition which has thus far been regarded as melting from a solid to a
liquid. We point out an alternative possibility of a two step process in which
there is a first order transit... | cond-mat_supr-con |
Predicted formation of superconducting platinum-hydride crystals under
pressure in the presence of molecular hydrogen: Noble metals adopt close-packed structures at ambient pressure and rarely
undergo structural transformation at high pressures. Platinum (Pt), in
particular, is normally considered to be unreactive an... | cond-mat_supr-con |
Periodicity in Al/Ti superconducting single electron transistors: We present experiments on single Cooper-pair transistors made of two
different superconducting materials. We chose Ti and Al to create an energy gap
profile such that the island has a higher gap than the leads, thereby acting as
a barrier to quasiparticl... | cond-mat_supr-con |
A Fully Quantum Mechanical Model of a SQUID Ring Coupled to an
Electromagnetic Field: A quantum system comprising of a monochromatic electromagnetic field coupled
to a SQUID ring with sinusoidal non-linearity, is studied. A magnetostatic flux
$\Phi_{x}$ is also threading the SQUID ring, and is used to control the
cou... | cond-mat_supr-con |
Vortices and quasiparticles near the "superconductor-insulator"
transition in thin films: We study the low temperature behavior of an amorphous superconducting film
driven normal by a perpendicular magnetic field (B). For this purpose we
introduce a new two-fluid formulation consisting of fermionized field induced
vo... | cond-mat_supr-con |
Study of grain boundary transparency in (Yb1-xCax)Ba2Cu3O bi-crystal
thin films over a wide temperature, field and field orientation range: The residual low angle grain boundary (GB) network is still the most
important current-limiting mechanism operating in bi-axially textured rare
earth barium copper oxide (REBCO) ... | cond-mat_supr-con |
Electron-phonon coupling in cuprate and iron-based superconductors
revealed by Raman scattering: Electron-phonon coupling (EPC) is one of the most common and fundamental
interactions in solids. It not only dominates many basic dynamic processes like
resistivity, thermal conductivity etc, but also provides the pairing... | cond-mat_supr-con |
Novel phase diagram for antiferromagnetism and superconductivity in
pressure-induced heavy-fermion superconductor Ce$_2$RhIn$_8$ probed by In-NQR: We present a novel phase diagram for the antiferromagnetism and
superconductivity in Ce$_2$RhIn$_8$ probed by In-NQR studies under pressure
($P$). The quasi-2D character o... | cond-mat_supr-con |
Magnetic Excitations in Strained Infinite-layer Nickelate PrNiO2: Strongly correlated materials often respond sensitively to the external
perturbations. In the recently discovered superconducting infinite-layer
nickelates, the superconducting transition temperature can be dramatically
enhanced via only ~1% compressive ... | cond-mat_supr-con |
Response to comment on "Broken translational and rotational symmetry via
charge stripe order in underdoped YBa2Cu3O6+y": Fine questions our interpretation of unidirectional-stripes over
bidirectional-checkerboard, and illustrates his criticism by simulating a
momentum space structure consistent with our data and corr... | cond-mat_supr-con |
Charge-Stripe Order and Superconductivity in $\mathrm{Ir_{1-x}Pt_xTe_2}$: A combined resistivity and hard x-ray diffraction study of superconductivity
and charge ordering in $\mathrm{Ir_{1-x}Pt_xTe_2}$, as a function of Pt
substitution and externally applied hydrostatic pressure, is presented.
Experiments are focused o... | cond-mat_supr-con |
Optical conductivity of CuO_2 infinite-layer films: The infrared conductivity of CaCuO_2, SrCuO_{2-y}, and
Sr_{0.85}Nd_{0.15}CuO_2 infinite-layer films is obtained from reflectivity
measurements by taking into account the substrate contribution. SrCuO_{2-y} and
Sr_{0.85}Nd_{0.15}CuO_2 exhibit extra-phonon modes and str... | cond-mat_supr-con |
Annealing, acid, and alcoholic beverage effects on Fe1+yTe0.6Se0.4: We have systematically investigated and compared different methods to induce
superconductivity in iron chalcogenide Fe1+yTe0.6Se0.4 including annealing in
vacuum, N2, O2, I2 atmosphere, and immersing samples into acid and alcoholic
beverages. Vacuum an... | cond-mat_supr-con |
Multiple nodeless superconducting gaps in noncentrosymmetric
superconductor PbTaSe2 with topological bulk nodal lines: Low-temperature thermal conductivity measurements were performed on single
crystal of PbTaSe$_2$, a noncentrosymmetric superconductor with topological
bulk nodal lines in the electronic band structur... | cond-mat_supr-con |
Tunneling studies in a homogeneously disordered s-wave superconductor:
NbN: We report the evolution of superconducting properties as a function of
disorder in homogeneously disordered epitaxial NbN thin films grown on (100)
MgO substrates, studied through a combination of electrical transport, Hall
Effect and tunneli... | cond-mat_supr-con |
Electronic Structure, Electron-Phonon Coupling, and Multiband Effects in
MgB2: We review the current situation in the theory of superconducting and
transport properties of MgB2. First principle calculations of of the electronic
structure and electron-phonon coupling are discussed and compared with the
experiment. We ... | cond-mat_supr-con |
Odd-frequency pairing and Ising spin susceptibility in time-reversal
invariant superfluids and superconductors: We here examine the relation between odd-frequency spin-triple even-parity
(OTE) Cooper pairs and anomalous surface magnetic response in time-reversal
invariant (TRI) spin-triplet superfluids and supercondu... | cond-mat_supr-con |
On the Excitations of a Balian-Werthamer Superconductor: My contribution to this collection of articles in honor of David Lee and John
Reppy on their 90th birthdays is a reflection on the remarkable phenomenology
of the excitation spectra of superfluid $^3$He, in particular the B-phase which
was identified by NMR and a... | cond-mat_supr-con |
Fully dense MgB_2 superconductor textured by hot deformation: Bulk textured MgB_2 material of nearly full density showing a weak c-axis
alignment of the hexagonal MgB_2 grains parallel to the pressure direction was
obtained by hot deformation of a stoichiometric MgB_2 pellet prepared by a
gas-solid reaction. The textur... | cond-mat_supr-con |
Critical Current Peaks at $3B_Φ$ in Superconductors with Columnar
Defects: Recrystalizing the Interstitial Glass: The role of commensurability and the interplay of correlated disorder and
interactions on vortex dynamics in the presence of columnar pins is studied via
molecular dynamics simulations. Simulations of dyn... | cond-mat_supr-con |
The Garber Current Pattern: An Additional Contribution to AC Losses in
Helical HTS Cables?: Conductors made of high-temperature (HTS) wires helically wound in one or
more layers on round tubes (CORT) are compact, flexible, and can carry a large
amount of current. Although these conductors were initially developed for... | cond-mat_supr-con |
The Thermodynamics and the Inverse Isotope Effect of superconducting PdH
and PdD under pressure: We present in this paper the thermodynamics of superconducting PdH and PdD
under pressure. We make use of a general method to calculate the thermodynamics
under pressure within the Migdal-Eliashberg theory. We have consid... | cond-mat_supr-con |
Encapsulating high-temperature superconducting twisted van der Waals
heterostructures blocks detrimental effects of disorder: High-temperature cuprate superconductors-based van der Waals (vdW)
heterostructures hold high technological promise. One of the obstacles
hindering progress is the detrimental effect of disord... | cond-mat_supr-con |
Ab-initio Studies of (Li$_{0.8}$Fe$_{0.2}$)OHFeSe Superconductors:
Revealing the Dual Roles of Fe$_{0.2}$ in Structural Stability and Charge
Transfer: The recently discovered (Li$_{0.8}$Fe$_{0.2}$)OHFeSe superconductor provides
a new platform for exploiting the microscopic mechanisms of high-$T_c$
superconductivity... | cond-mat_supr-con |
$η$ collective mode as A$_{1g}$ Raman resonance in cuprate
superconductors: We discuss the possible existence a spin singlet excitation with charge
$\pm2$ ($\eta$-mode) originating the $A_{1g}$ Raman resonance in cuprate
superconductors. This $\eta$-mode relates the $d$-wave superconducting singlet
pairing channel to... | cond-mat_supr-con |
Anomalous metallic state above the upper critical field of the
conventional three-dimensional superconductor AgSnSe2 with strong intrinsic
disorder: We report superconducting properties of AgSnSe2 which is a conventional
type-II superconductor in the very dirty limit due to intrinsically strong
electron scatterings... | cond-mat_supr-con |
Induced ferromagnetic moment at the interface between epitaxial
SrRuO$_3$ film and Sr$_2$RuO$_4$ single crystal: SrRuO$_3$ (SRO113) is an important material for device physics particularly
as one of the best metallic oxide electrodes for ferroelectric devices. This
oxide has moderate electron correlations with novel ... | cond-mat_supr-con |
Superconducting Quantum Interference at the Atomic Scale: A single spin in a Josephson junction can reverse the flow of the
supercurrent. At mesoscopic length scales, such $\pi$-junctions are employed in
various instances from finding the pairing symmetry to quantum computing. In
Yu-Shiba-Rusinov (YSR) states, the atom... | cond-mat_supr-con |
Comment on "Quantum Melting of the Quasi-Two-Dimensional Vortex Lattice
in $κ-(ET)_2Cu(NCS)_2$": In a recent Letter Mola et al. \cite{mola} reported magnetization
measurements $M(H,\theta)$ performed on the organic superconductor
$\kappa-$(ET)$_2$Cu(NCS)$_2 (T_c = 9.1$ K) as a function of the magnetic field
$H$ appli... | cond-mat_supr-con |
Exactly solvable pairing models in two dimensions: The BCS theory models electron correlations with pure zero-momentum pairs.
Here we consider a family of pairing Hamiltonians, where the electron
correlations are modelled with pure arbitrary-momentum pairs. We find all
models in the family are exactly solvable, and pre... | cond-mat_supr-con |
Single Crystal Growth of Cuprate Superconductor
(Lu$_{0.8}$Nd$_{0.2}$)Ba$_2$Cu$_4$O$_8$ by KOH Flux Method: Single crystals of Nd-substituted LuBa$_2$Cu$_4$O$_8$ were successfully grown
by the KOH flux method. The single phase of Lu$_{1-x}$Nd$_x$Ba$_2$Cu$_4$O$_8$
[(Lu,Nd)124] formed at $x = 0.2$. The compound crystal... | cond-mat_supr-con |
Observation of novel gapped phases in potassium doped single layer
p-terphenyl on Au (111): Recently, superconductivity in potassium (K) doped p-terphenyl (C18H14) has
been suggested by the possible observation of the Meissner effect and
subsequent photoemission spectroscopy measurements, but the detailed lattice
str... | cond-mat_supr-con |
The Effects of d_{x^2-y^2}-d_{xy} Mixing on Vortex Structures and
Magnetization: The structure of an isolated single vortex and the vortex lattice, and the
magnetization in a $d$-wave superconductor are investigated within a
phenomenological Ginzburg-Landau (GL) model including the mixture of the
$d_{x^2-y^2}$-wave a... | cond-mat_supr-con |
Interplay between kinetic inductance, non-linearity and quasiparticle
dynamics in granular aluminum MKIDs: Microwave kinetic inductance detectors (MKIDs) are thin film, cryogenic,
superconducting resonators. Incident Cooper pair-breaking radiation increases
their kinetic inductance, thereby measurably lowering their ... | cond-mat_supr-con |
Multimodal synchrotron X-ray diffraction across the superconducting
transition of Sr$_{0.1}$Bi$_2$Se$_3$: In the doped topological insulator Sr$_x$Bi$_2$Se$_3$, a pronounced in-plane
two-fold symmetry is observed in electronic properties below the
superconducting transition temperature $T_c \sim$ 3 K, despite the thr... | cond-mat_supr-con |
Superconductivity-insensitive order at $q$~1/4 in electron doped
cuprates: One of the central questions in the cuprate research is the nature of the
"normal state" which develops into high temperature superconductivity (HTSC).
In the normal state of hole-doped cuprates, the existence of charge density
wave (CDW) is e... | cond-mat_supr-con |
The c axis optical conductivity of layered systems in the
superconducting state: In this paper, we discuss the c axis optical conductivity Re [sigma_c(omega)]
in the high T_c superconductors, in the superconducting state. The basic
premise of this work is that electrons travelling along the c axis between
adjacent Cu... | cond-mat_supr-con |
Group-9 Transition Metal Suboxides Adopting the Filled-Ti$_2$Ni
Structure: A Class of Superconductors Exhibiting Exceptionally High Upper
Critical Fields: The Ti$_2$Ni and the related $\eta$-carbide structure are known to exhibit
various intriguing physical properties. The Ti$_2$Ni structure with the cubic
space gr... | cond-mat_supr-con |
Materials Informatics Reveals Unexplored Structure Space in Cuprate
Superconductors: High-temperature superconducting cuprates have the potential to be
transformative in a wide range of energy applications. In this work we analyse
the corpus of historical data about cuprates using materials informatics and
re-examine... | cond-mat_supr-con |
High-Temperature Superconductivity Mechanism for Cuprates: Egorov and March plotted the product of resistivity and the copper
spin-lattice relaxation time vs. temperature for yttrium barium copper oxide
finding a minimum at temperature T greater than the superconducting
temperature, heralding an electronic phase change... | cond-mat_supr-con |
STM/STS study on large pseudogap and nodal superconducting gap in
Bi2201(La) and Bi2212: In the present work, scanning tunneling microscopy/spectroscopy (STM/STS)
measurements were carried out on underdoped $\rm Bi_2Sr_{2-{\it x}}La_{\it
x}CuO_{6+\delta}$ and $\rm Bi_2Sr_2CaCu_2O_{8+\delta}$ to clarify the origin of
... | cond-mat_supr-con |
Ginzburg-Landau expansion and the upper critical field in disordered
attractive Hubbard model: We present a short review of our studies of disorder influence upon Ginzburg
- Landau expansion coefficients in Anderson - Hubbard model with attraction in
the framework of the generalized DMFT+$\Sigma$ approximation. A wid... | cond-mat_supr-con |
Pairing mechanism in Fe pnictide superconductors: By applying an exact unitary transformation to a two-band hamiltonian which
also includes the effects due to large pnictogen polarizabilities, we show that
an attractive spin-mediated Hubbard term appears in the $d_{xz}$, $d_{yz}$
nearest-neighbour channel. This pairing... | cond-mat_supr-con |
Comment on the paper by D. Efremov and Yu.N. Ovchinnikov "Singular
ground state of multiband inhomogeneous superconductors", Phys. Rev. B 99,
224508 (2019): We show that the conclusion reported in Ref. 1, that there are no spontaneous
magnetic fields in multiband superconductors that break time reversal symmetry,
i... | cond-mat_supr-con |
Signatures of a pair density wave at high magnetic fields in cuprates
with charge and spin orders: In underdoped cuprates, the interplay of the pseudogap, superconductivity,
and charge and spin ordering can give rise to exotic quantum states, including
the pair density wave (PDW), in which the superconducting (SC) or... | cond-mat_supr-con |
Measuring the Localization Length through the superconductor-insulator
transition in ultrathin amorphous beryllium films: Electron transport and tunneling across the superconductor-insulator (SI)
transition have been measured simultaneously for quench-condensed ultrathin
amorphous beryllium films. The anomalous negat... | cond-mat_supr-con |
Magnetic resonance peak and nonmagnetic impurities: Nonmagnetic Zn impurities are known to strongly suppress superconductivity.
We review their effects on the spin excitation spectrum in $\rm
YBa_2Cu_3O_{7}$, as investigated by inelastic neutron scattering measurements. | cond-mat_supr-con |
Pressure effects on the electronic structure and superconductivity of
(TaNb)$_{0.67}$(HfZrTi)$_{0.33}$ high entropy alloy: Effects of pressure on the electronic structure, electron-phonon interaction,
and superconductivity of the high entropy alloy
(TaNb)$_{0.67}$(HfZrTi)$_{0.33}$ are studied in the pressure range 0 ... | cond-mat_supr-con |
Positive current cross-correlations in a highly transparent
normal-superconducting beam splitter due to synchronized Andreev and inverse
Andreev reflections: Predictions are established for linear differential current-current
cross-correlations dSab/dV in a symmetrically biased three-terminal normal
metal-supercond... | cond-mat_supr-con |
Bosonic spectral density of epitaxial thin-film La1.83Sr0.17CuO4
superconductors from infrared conductivity measurements: We use optical spectroscopy to investigate the excitations responsible for
the structure in the optical self-energy of thin epitaxial films of
La1.83Sr0.17CuO4. Using Eliashberg formalism to inver... | cond-mat_supr-con |
Theory of heterotic SIS Josephson junctions between single- and
multi-gap superconductors: Using the functional integral method, we construct a theory of heterotic SIS
Josephson junctions between single- and two-gap superconductors. The theory
predicts the presence of in-phase and out-of-phase collective oscillation ... | cond-mat_supr-con |
Bimagnon studies in cuprates with Resonant Inelastic X-ray Scattering at
the O K edge. I - An assessment on La2CuO4 and a comparison with the
excitation at Cu L3 and Cu K edges: We assess the capabilities of magnetic Resonant Inelastic X-ray Scattering
(RIXS) at the O $K$ edge in undoped cuprates by taking La_{2}Cu... | cond-mat_supr-con |
Single vortex fluctuations in a superconducting chip as generating
dephasing and spin flips in cold atom traps: We study trapping of a cold atom by a single vortex line in an extreme type
II superconducting chip, allowing for pinning and friction. We evaluate the
atom's spin flip rate and its dephasing due to the vor... | cond-mat_supr-con |
Hidden Reentrant and Larkin-Ovchinnikov-Fulde-Ferrell Superconducting
Phases in a Magnetic Field in (TMTSF)$_2$ClO$_4$: We solve a long-standing problem about a theoretical description of the upper
critical magnetic field, parallel to conducting layers and perpendicular to
conducting chains, in (TMTSF)$_2$ClO$_4$ sup... | cond-mat_supr-con |
Phase stiffness in an antiferromagnetic superconductor: We analyze the suppression of the phase stiffness in a superconductor by
antiferromagnetic order. The analysis is based on a general expression for the
phase stiffness in a mean-field state with coexisting spin-singlet
superconductivity and spiral magnetism. Neel ... | cond-mat_supr-con |
Inhomogeneity of charge density wave order and quenched disorder in a
high Tc superconductor: It has recently been established that the high temperature (high-Tc)
superconducting state coexists with short-range charge-density-wave order and
quenched disorder arising from dopants and strain. This complex, multiscale
p... | cond-mat_supr-con |
Evidence for a universal length scale of dynamic charge inhomogeneity in
cuprate superconductors: Time-resolved optical experiments can give unique information on the
characteristic length scales of dynamic charge inhomogeneity on femtosecond
timescales. From data on the effective quasiparticle relaxation time ᠋... | cond-mat_supr-con |
Josephson squelch filter for quantum nanocircuits: We fabricated and tested a squelch circuit consisting of a copper powder
filter with an embedded Josephson junction connected to ground. For small
signals (squelch-ON), the small junction inductance attenuates strongly from DC
to at least 1 GHz, while for higher freque... | cond-mat_supr-con |
Quantum phase slip junctions: In this paper we demonstrate that, if it exists, coherent quantum phase slip
is the exact dual to Josephson tunneling. We use the duality to predict kinetic
capacitance and a sharp resonance in narrow wires. Biased resistively and
driven at high frequency, quantum phase slip junctions shou... | cond-mat_supr-con |
Type I superconductivity in the Dirac semimetal PdTe2: The superconductor PdTe$_2$ was recently classified as a Type II Dirac
semimetal, and advocated to be an improved platform for topological
superconductivity. Here we report magnetic and transport measurements conducted
to determine the nature of the superconducting... | cond-mat_supr-con |
Collective excitations in two-band superconductors: We investigate the eigen oscillations of internal degrees of freedom (Higgs
mode and Goldstone mode) of two-band superconductors using the extended
time-dependent Ginzburg-Landau theory, formulated in a work Grigorishin (2021)
\cite{grig2}, for the case of two coupled... | cond-mat_supr-con |
Dynamics of spin transport in voltage-biased Josephson junctions: We investigate spin transport in voltage-biased spin-active Josephson
junctions. The interplay of spin filtering, spin mixing, and multiple Andreev
reflection leads to nonlinear voltage dependence of the dc and ac spin current.
We compute the voltage cha... | cond-mat_supr-con |
On superconducting mechanism in the iron-based layered superconductors: It is demonstrated that SC mechanism of doped Fe-based compounds is
characteristic for itinerant electron systems with coexistence of both (e-e)-
and (e-h)-pairing arising due to electron-phonon and Coulomb interactions,
respectively. The higher Tc... | cond-mat_supr-con |
High-energy magnetic excitations in overdoped
La$_{2-x}$Sr$_{x}$CuO$_{4}$ studied by neutron and resonant inelastic X-ray
scattering: We have performed neutron inelastic scattering and resonant inelastic X-ray
scattering (RIXS) at the Cu-$L_3$ edge to study high-energy magnetic
excitations at energy transfers of mo... | cond-mat_supr-con |
Pairing symmetry in BiS$_{2}-$based superconductors: The possible pairing symmetries for BiS$_{2}-$based superconductors is
investigated by using a minimal two-orbital model with onsite and
nearest-neighbor intraorbital attractions $V_{0}$ and $V_{1}$, respectively. By
using the mean-field approximation and solving the... | cond-mat_supr-con |
Gap and pseudogap evolution within the charge-ordering scenario for
superconducting cuprates: We describe the spectral properties of underdoped cuprates as resulting from
a momentum-dependent pseudogap in the normal state spectrum. Such a model
accounts, within a BCS approach, for the doping dependence of the critica... | cond-mat_supr-con |
Topological Anomalous Skin Effect in Weyl Superconductors: We show that a Weyl superconductor can absorb light via a novel
surface-to-bulk mechanism, which we dub the topological anomalous skin effect.
This occurs even in the absence of disorder for a single-band superconductor,
and is facilitated by the topological sp... | cond-mat_supr-con |
Is spontaneous vortex generation in superconducting 4Hb-TaS$_2$ from
vison-vortex nucleation with $\mathbb{Z}_2$ topological order?: We propose the superconducting van der Waals material 4Hb-TaS$_2$ to realize
the $\mathbb{Z}_2$ topological order and interpret the recent discovery of the
spontaneous vortex generation... | cond-mat_supr-con |
Frustrated Magnetic Interactions, Giant Magneto-Elastic Coupling, and
Magnetic Phonons in Iron-Pnictides: We present a detailed first principles study of Fe-pnictides with particular
emphasis on competing magnetic interactions, structural phase transition, giant
magneto-elastic coupling and its effect on phonons. The... | cond-mat_supr-con |
Design and implementation of a micro-coil induction magnetometer: We present a micron-sized induction magnetometer designed to measure the
magnetic response of superconducting mesoscopic samples. The device is
manufactured using the Memscap PolyMUMPs process and consists of two octagonal
planar parallel micro-coils cov... | cond-mat_supr-con |
SU(4) Dynamical Symmetry and the Origin of Pseudogaps: This paper has been withdrawn by the author due to incomplete interpretation
for the results. | cond-mat_supr-con |
A Terraced Scanning Superconducting Quantum Interference Device
Susceptometer with Sub-Micron Pickup Loops: Superconducting Quantum Interference Devices (SQUIDs) can have excellent spin
sensitivity depending on their magnetic flux noise, pick-up loop diameter, and
distance from the sample. We report a family of scann... | cond-mat_supr-con |
Spin-excitation anisotropy in the nematic state of detwinned FeSe: The origin of the electronic nematicity in FeSe is one of the most important
unresolved puzzles in the study of iron-based superconductors. In both spin-
and orbital-nematic models, the intrinsic magnetic excitations at
$\mathbf{Q}_1=(1, 0)$ and $\mathb... | cond-mat_supr-con |
Exploring the vortex phase diagram of Bogoliubov-de Gennes disordered
superconductors: We study the interplay of vortices and disorder in a two-dimensional
disordered superconductor at zero temperature described by the Bogoliubov-de
Gennes (BdG) self-consistent formalism for lattices of sizes up to
$100\times100$ whe... | cond-mat_supr-con |
Physical mechanisms of timing jitter in photon detection by current
carrying superconducting nanowires: We studied timing jitter in the appearance of photon counts in meandering
nanowires with different fractional amount of bends. Timing jitter, which is
the probability density of the random time delay between photon... | cond-mat_supr-con |
1D Bose Gases in an Optical Lattice: We report on the study of the momentum distribution of a one-dimensional Bose
gas in an optical lattice. From the momentum distribution we extract the
condensed fraction of the gas and thereby measure the depletion of the
condensate and compare it with a theorical estimate. We have ... | cond-mat_supr-con |
Band-mixing-mediated Andreev reflection of semiconductor holes: We have investigated Andreev-reflection processes occurring at a clean
interface between a $p$-type semiconductor and a conventional superconductor.
Our calculations are performed within a generalized Bogoliubov-de Gennes
formalism where the details of the... | cond-mat_supr-con |
Extraordinary magnetoresistance in graphite: experimental evidence for
the time-reversal symmetry breaking: The ordinary magnetoresistance (MR) of doped semiconductors is positive and
quadratic in a low magnetic field, B, as it should be in the framework of the
Boltzmann kinetic theory or in the conventional hopping ... | cond-mat_supr-con |
Thermal evolution of antiferromagnetic correlations and tetrahedral bond
angles in superconducting FeTe$_{1-x}$Se$_x$: It has recently been demonstrated that dynamical magnetic correlations
measured by neutron scattering in iron chalcogenides can be described with
models of short-range correlations characterized by p... | cond-mat_supr-con |
Electronic structure and Fermi surface of iron-based superconductors
R2Fe3Si5 (R = Lu;Y;Sc) from first principles: Electronic structures of three superconducting rare-earth iron silicides
(Lu;Y;Sc)2Fe3Si5 and non-superconducting Lu2Ru3Si5, adopting a tetragonal
crystal structure (P4/mnc), have been calculated employi... | cond-mat_supr-con |
Field dependence of the vortex core size in a multi-band superconductor: The magnetic field dependence of the vortex core size in the multi-band
superconductor NbSe2 has been determined from muon spin rotation measurements.
The spatially extended nature of the quasiparticle core states associated with
the smaller gap l... | cond-mat_supr-con |
Electron Correlations in the High Tc-Compounds: Ab-initio correlation results for an idealized high Tc-compound are compared
to density functional (DF) calculations for the same system. It is shown that
and why the DF-charge distribution is wrong. The largest deficiency arises for
the Cu-d(x2-y2)-occupation, originatin... | cond-mat_supr-con |
Structural and Magnetic Instabilities of La$_{2-x}$Sr$_x$CaCu$_2$O$_6$: A neutron scattering study of nonsuperconducting
La$_{2-x}$Sr$_x$CaCu$_2$O$_6$ (x=0 and 0.2), a bilayer copper oxide without CuO
chains, has revealed an unexpected tetragonal-to-orthorhombic transition with a
doping dependent transition temperature... | cond-mat_supr-con |
Staggered Pairing Phenomenology for UPd_2Al_3 and UNi_2Al_3: We apply the staggered-pairing Ginzburg-Landau phenomenology to describe
superconductivity in UPd_2Al_3 and UNi_2Al_3. The phenomenology was applied
successfully to UPt_3 so it explains why these materials have qualitatively
different superconducting phase di... | cond-mat_supr-con |
Superconductivity in silicon: a review: Silicon, one of the most abundant elements found on Earth, has been an
excellent choice of the semiconductor industry for ages. Despite it's
remarkable applications in modern semiconductor-based electronic devices, the
potential of cubic silicon in superconducting electronics rem... | cond-mat_supr-con |
Field Dependence of the Superconducting Basal Plane Anisotropy of
TmNi2B2C: The superconductor TmNi2B2C possesses a significant four-fold basal plane
anisotropy, leading to a square Vortex Lattice (VL) at intermediate fields.
However, unlike other members of the borocarbide superconductors, the
anisotropy in TmNi2B2C... | cond-mat_supr-con |
High-pressure synthesis and superconductivity of the novel Laves phase
BaIr2: Superconductors comprising 5d transition metals of Ir and Pt have been widely
explored because they have the potential of unique superconductivity caused by
the strong spin-orbit interaction (SOI). We successfully synthesized BaIr2, the
las... | cond-mat_supr-con |
Minimal timing jitter in superconducting nanowire single photon
detectors: Using two-temperature model coupled with modified time-dependent
Ginzburg-Landau equation we calculate the delay time $\tau_d$ in appearance of
growing normal domain in the current-biased superconducting strip after
absorption of the single ph... | cond-mat_supr-con |
Switching current distributions and subgap structures of underdoped
(Hg,Re)Ba2Ca2Cu3O8+d intrinsic Josephson junctions: We have investigated the intrinsic Josephson properties in slightly
underdoped (Hg,Re)Ba2Ca2Cu3Oy [Hg(Re)1223] intrinsic Josephson junctions (IJJs)
with a dimension of 1.0x1.5x0.11 um^3. The current... | cond-mat_supr-con |
Superuid density in overdoped cuprates: thin films versus bulk samples: Recent study of overdoped La$_{2-x}$Sr$_x$CuO$_4$ cuprate superconductor thin
films by Bo\v{z}ovi\'{c} {\it et al.} has revealed several unexpected findings,
most notably the violation of the BCS description which was believed to
adequately describ... | cond-mat_supr-con |
Electronic structure in one-Fe Brillouin zone of iron-pnictide
superconductor CsFe$_2$As$_2$: The multiband nature of iron-pnictide superconductors is one of the keys to
the understanding of their intriguing behavior. The electronic and magnetic
properties heavily rely on the multiband interactions between different
... | cond-mat_supr-con |
High-temperature superconductivity in one-unit-cell FeSe films: Since the dramatic interface enhancement of superconducting transition
temperature (Tc) was reported in one unit-cell FeSe film grown on SrTiO3
substrate (1-UC FeSe/STO) by molecular beam epitaxy (MBE), related research on
this system has become a new fron... | cond-mat_supr-con |
Scanning Tunneling Spectroscopy and Vortex Imaging in the Iron-Pnictide
Superconductor BaFe$_{1.8}$Co$_{0.2}$As$_2$: We present an atomic resolution scanning tunneling spectroscopy study of
superconducting BaFe$_{1.8}$Co$_{0.2}$As$_2$ single crystals in magnetic fields
up to $9 \text{Tesla}$. At zero field, a single ... | cond-mat_supr-con |
Electromagnetic response of superconductors and optical sum rule: The interrelation between the condensation energy and the optical sum rules
has been investigated. It has been shown that the so called 'partial' sum rule
violation is related mainly to a temperature dependence of the relaxation rate
rather than to the a... | cond-mat_supr-con |
Gapless helical superconductivity on the surface of a three-dimensional
topological insulator: Recent angle-resolved photoemission experiments have observed a
proximity-induced superconducting gap in the helical surface states of a thin
film of the 3D topological insulator Bi$_2$Se$_3$ grown on a superconducting
NbSe... | cond-mat_supr-con |
Microscopic mechanism for fluctuating pair density wave: In weakly coupled BCS superconductors, only electrons within a tiny energy
window around the Fermi energy, $E_F$, form Cooper pairs. This may not be the
case in strong coupling superconductors such as cuprates, FeSe, SrTiO$_3$ or
cold atom condensates where the p... | cond-mat_supr-con |
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